How to create a referenced return line within the original sales order in UI

Summary:

We have created a referenced return line within the original sales order that we are returning, but we cannot do this within the UI. Please tell me if this feature is only available via API or if we can do it within the UI as well.

Content (please ensure you mask any confidential information):

Below is a screenshot that shows the original SO is 2733. We did a return of item 2034 (line 1) and item 337 (Line 2) via API. We would like to be able to do this in the UI, when when we attempt it, Oracle ALWAYS creates a new Sales Order.